compiler error,when i compile the C# programming in command prompt

hi all, i am narendra doing as a software developer in dotnet technologies.i am a new member to this site.i wrote one C# programm.i compile that programm in command prompt,by using "CSC" command.but it gives error,the error is Meta data file "mscorlib.dll" is not opened and no such interface is supported,what should i do.please help me,how can i rectify this error.Thanks in advanceRegardsNarendra

: hi all,: i am narendra doing as a software developer in dotnet technologies.i am a new member to this site.: i wrote one C# programm.: i compile that programm in command prompt,by using "CSC" command.: but it gives error,the error is Meta data file "mscorlib.dll" is not opened and no such interface is supported,what should i do.: please help me,how can i rectify this error.: Thanks in advance: Regards: Narendra: :